Description
Why It’s Done (Purpose):
1. Screen for Hepatitis B Infection:
o This test is used for routine screening in high-risk individuals, such as:
Pregnant women (to prevent mother-to-child transmission).
Blood donors (to ensure safe blood transfusions).
People at high risk for Hepatitis B, such as those who inject drugs, have multiple sexual partners, or are exposed to contaminated blood in healthcare settings.
2. Diagnose Active Hepatitis B Infection:
o A positive result indicates active infection and is used to identify both acute and chronic Hepatitis B infection.
o It helps monitor liver function and determine the need for further diagnostic testing.
3. Assess Infectivity:
o If HBsAg is present in the blood for more than 6 months, the infection is likely chronic.
o A persistent presence of HBsAg indicates that the person can transmit the virus to others, which is important for public health.
4. Monitor Hepatitis B Vaccination Status:
o A negative result could indicate that the person is not infected and may need to be vaccinated, especially if they are at high risk for exposure to the virus.
Preparation Guidelines:
• No special preparation is needed for this test.
• Fasting is not required.
• A blood sample will be drawn from a vein.
• Inform your healthcare provider about:
o Any current symptoms (such as jaundice, fatigue, abdominal pain, or dark urine) that could indicate a Hepatitis B infection.
o Any liver disease history or prior Hepatitis B exposure.
o If you have received a Hepatitis B vaccination, as it might influence test interpretation.
